If you know someone who has a tattoo, there is a very strong possibility that you know someone with two or more inkings on their body. Tattoos are like potato chips, it’s really hard to stop with just one.

Tattoos have been worn since the early days of civilization. They seemingly have been around forever and they just keep getting more popular every year. And, their popularity knows no sex or class distinction. Bikers have their “Live to Ride” tats and socialites have their discreetly placed “butterfly” tattoos.

Now through Sunday, the Pennsylvania Convention Center in Philadelphia is hosting the Philadelphia Tattoo Arts Convention. The convention runs from 2 p.m.-midnight today, noon-midnight on Saturday and noon-8 p.m. on Sunday. The main focus of the convention will be hundreds of booths hosted by top-flight tattoo artists.

The roster of attractions for Sunday features Penguin Boy & Baron, Olde City Sideshow, The Enigma & Serana Rose, tattoo contests, “Tattoo of the Day/Best in Show” with Freshly Inked Magazine and an “After Party” at the Trestle Inn.

Other attractions include a video game tournament, free samples, raffles and kids’ activities (including face painting and temporary tattoos), a Crazy Philadelphia Eddie book signing and Mike Skiver’s Tattoo Museum. There will also be opportunities for show attendees to have pictures of their tattoos taken by a number of magazines.